1255665606 has 48 divisors (see below), whose sum is σ = 2813207760. Its totient is φ = 373027200.

The previous prime is 1255665569. The next prime is 1255665617. The reversal of 1255665606 is 6065665521.

It is a super-2 number, since 2×1255665606² = 3153392228182694472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8056 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (58608495).

Almost surely, 2^1255665606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255665606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1406603880).

1255665606 is an abundant number, since it is smaller than the sum of its proper divisors (1557542154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255665606 is a wasteful number, since it uses less digits than its factorization.

1255665606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42761 (or 42748 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 1255665606 is about 35435.3722430004. The cubic root of 1255665606 is about 1078.8423827445.

The spelling of 1255665606 in words is "one billion, two hundred fifty-five million, six hundred sixty-five thousand, six hundred six".